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Initial low/hard state, multiple jet ejections and X-ray/radio correlations during the outburst of XTE J1859+226

C. Brocksopp·R. P. Fender·M. McCollough·G. G. Pooley·M. P. Rupen·R. M. Hjellming·C. J. de la Force·R. E. Spencer·T. W. B. Muxlow·S. T. Garrington·S. Trushkin
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Abstract

We have studied the 1999 soft X-ray transient outburst of XTE J1859+226 at radio and X-ray wavelengths. The event was characterised by strong variability in the disc, corona and jet - in particular, a number of radio flares (ejections) took place and seemed well-correlated with hard X-ray events. Apparently unusual for the `canonical soft' X-ray transient, there was an initial period of low/hard state behaviour during the rise from quiescence but prior to the peak of the main outburst - we show that not only could this initial low/hard state be an ubiquitous feature of soft X-ray transient outbursts but that it could also be extremely important in our study of outburst mechanisms.

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C. Brocksopp, R. P. Fender, M. McCollough, G. G. Pooley, M. P. Rupen, R. M. Hjellming, C. J. de la Force, R. E. Spencer, T. W. B. Muxlow, S. T. Garrington, S. Trushkin. 2001-12-06. Initial low/hard state, multiple jet ejections and X-ray/radio correlations during the outburst of XTE J1859+226. https://doi.org/10.1046/j.1365-8711.2002.05230.x

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